Larsen steel sheet pile for synchronous grouting during pile pulling and steel sheet pile supporting structure
By equipping Larssen sheet piles with grouting pipes and duckbill valves, synchronous grouting during pile extraction was achieved, solving the problems of untimely and uneven grouting in traditional methods, improving grouting efficiency and effectiveness, and reducing soil deformation and impact on surrounding structures.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2026-03-31
AI Technical Summary
During the extraction of Larsen sheet piles, changes in the soil structure around the piles cause voids that cannot be filled in time, affecting surrounding structures and pipelines. Traditional grouting methods are inefficient and uneven, and cannot effectively prevent ground settlement and cracking.
Design a Larssen sheet pile with simultaneous grouting during pile extraction. Equipped with a grouting pipe and connected to a duckbill valve, the grouting pipe is driven into the ground along with the sheet pile. When pulled out, grout is injected through the duckbill valve to fill the voids, eliminate negative pressure, and compact the loose soil.
This method enables timely filling of voids during pile extraction, reducing soil deformation and impact on surrounding structures, improving grouting efficiency and uniformity, and preventing ground settlement and cracking.
Smart Images
Figure CN224063436U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of sheet piles, and more specifically, to a Larssen sheet pile and sheet pile support structure that involves simultaneous grouting during pile extraction. Background Technology
[0002] Larssen sheet piles are building materials used as retaining walls, water barriers, and sand barriers in bridge cofferdams, large pipeline laying, and temporary ditch excavation. Larssen sheet piles are displacement piles; when extracted, they create voids in the pile shaft that are filled with soil. This filling of the surrounding soil causes a redistribution of soil particles, leading to ground settlement and cracking within a certain area. It also affects surrounding pipelines and structures. Therefore, after the sheet piles are extracted, grouting pipes are typically drilled and installed to fill the voids and reinforce the structure.
[0003] However, during the extraction of sheet piles, the soil structure around the piles is constantly changing. Often, grouting after extraction cannot fill the gaps in time to avoid damage to surrounding structures and pipelines. Furthermore, traditional grouting pipes are typically lowered to the bottom of the sheet piles by drilling holes one by one after extraction, using a staggered pattern of holes. This process is time-consuming, results in untimely and uneven grouting, and the staggered holes are prone to clogging, affecting grouting efficiency and volume. Consequently, traditional grouting methods after sheet pile extraction are inefficient and untimely, failing to prevent ground subsidence and cracking, as well as settlement of pipelines and structures. Utility Model Content
[0004] The purpose of this application is to provide a Larssen sheet pile and sheet pile support structure that can be grouted simultaneously during pile extraction. It can use grouting pipes to fill the pores generated during the extraction of Larssen sheet piles, thereby timely filling the voids left during pile extraction, eliminating negative pressure, compacting the disturbed loose soil, and reducing soil deformation and the impact on surrounding pipelines and road structures.
[0005] This application is implemented as follows:
[0006] This application provides a Larssen sheet pile for simultaneous grouting during pile extraction, including a Larssen sheet pile body and at least one grouting pipe connected to the outer wall of the Larssen sheet pile body. The bottom of the grouting pipe extends to the bottom of the Larssen sheet pile body and is connected to a duckbill valve.
[0007] In some alternative implementations, the Larssen sheet pile body is also connected to at least one clamp for securing the grouting pipe.
[0008] In some alternative implementations, the Larssen sheet pile body is connected to at least one fixing plate, and the clamps and grouting pipes are connected to at least one fixing plate.
[0009] In some alternative implementations, the bottom of the grouting pipe is connected to at least one valve guard plate located on the side of the duckbill valve.
[0010] In some alternative implementations, at least one reinforcing rod is also included, with its two ends connected to two valve guard plates, respectively.
[0011] In some alternative implementations, the outer wall of the Larssen sheet pile body is provided with multiple side protrusions extending along the height direction.
[0012] In some alternative implementations, the bottom corner of the Larssen sheet pile body is raised to form a bottom corner bump.
[0013] In some alternative embodiments, a retaining plate is provided at the bottom of the grouting pipe, and a retaining rod extending to the top of the grouting pipe is hinged to the top of the retaining plate. A fixing seat is provided at the top of the grouting pipe, and a fixing hole for inserting the retaining rod is opened at the bottom of the fixing seat. The fixing hole penetrates the side wall of the fixing seat to form an opening.
[0014] This application also provides a sheet pile support structure comprising a plurality of Larssen sheet piles that are connected in sequence and grouted synchronously during the extraction of the piles.
[0015] The beneficial effects of this application are as follows: The Larssen sheet pile with simultaneous grouting during pile extraction provided in this application includes a Larssen sheet pile body and at least one grouting pipe connected to the outer wall of the Larssen sheet pile body. The bottom of the grouting pipe extends to the bottom of the Larssen sheet pile body and is connected to a duckbill valve. The Larssen sheet pile with simultaneous grouting during pile extraction and the sheet pile support structure provided in this application can drive the grouting pipe into the ground along with the Larssen sheet pile, and use the grouting pipe to fill the pores generated during the extraction of the Larssen sheet pile, thereby timely filling the voids left during pile extraction, eliminating negative pressure, compacting the disturbed loose soil, and reducing soil deformation and the impact on surrounding pipelines and road structures. Attached Figure Description
[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a partial structural schematic diagram of a Larssen sheet pile with simultaneous grouting during pile extraction, as provided in Embodiment 1 of this application.
[0018] Figure 2 A partial structural diagram of the grouting pipe, duckbill valve, and fixing steel plate in the Larssen sheet pile with synchronous grouting during pile extraction, as provided in Embodiment 1 of this application;
[0019] Figure 3 This is a partial structural schematic diagram of a Larssen sheet pile with simultaneous grouting during pile extraction, as provided in Embodiment 2 of this application.
[0020] Figure 4 This is a partial cross-sectional view of the grouting pipe in a Larssen sheet pile where grouting is performed simultaneously during pile extraction, as provided in Embodiment 3 of this application.
[0021] In the diagram: 100, Larssen sheet pile body; 110, grouting pipe; 120, duckbill valve; 130, clamp; 140, fixing steel plate; 150, valve protection steel plate; 160, reinforcing rod; 170, side protrusion; 180, bottom corner protrusion; 190, retaining plate; 200, retaining rod; 210, fixing seat; 220, fixing hole; 230, opening. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0023] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0025] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0026] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0027] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0028] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0029] The following describes in further detail the features and performance of the Larssen sheet piles and sheet pile support structures with simultaneous grouting during pile extraction, in conjunction with embodiments of the present application.
[0030] Example 1
[0031] like Figure 1 and Figure 2As shown in the figure, this application embodiment provides a Larssen sheet pile with synchronous grouting during pile extraction, including a Larssen sheet pile body 100 and a grouting pipe 110 connected to the outer wall of the Larssen sheet pile body 100. The top and bottom of the grouting pipe 110 extend to the top and bottom of the Larssen sheet pile body 100, respectively. A duckbill valve 120 is connected to the bottom of the grouting pipe 110. Two fixed steel plates 140 arranged vertically and horizontally are welded to the outer wall of the Larssen sheet pile body 100. Each fixed steel plate 140 is connected to a clamp 130 for fixing the grouting pipe 110. The grouting pipe 110 is welded and fixed to the two fixed steel plates 140 respectively. Two valve protection steel plates 150 are connected to the bottom of the grouting pipe 110 and are arranged opposite to each other and located on both sides of the duckbill valve 120. In this embodiment, the grouting pipe 110 has a diameter of 30mm and a thickness of 3mm; the fixed steel plate 140 has a length and width of 50mm and a thickness of 3mm, and the distance between the two clamps 130 is 1000mm; the duckbill valve 120 is made of rubber, with an outer diameter of 40mm, an inner hole of 30mm, and a total height of 60mm, and the duckbill valve 120 is connected to the grouting pipe 110 by threaded connection; the valve protection steel plate 150 has a thickness of 5mm, an upper width of 50mm, a lower width of 20mm, and a height of 40mm.
[0032] When using the Larssen sheet pile with simultaneous grouting during pile extraction provided in this embodiment, a pilot hole is pre-drilled at a predetermined position on the grouting pipe 110 using a rotary drilling rig or auger. Then, the Larssen sheet pile body 100 is driven into the ground, and the grouting pipe 110, connected to the outer wall of the Larssen sheet pile body 100, is driven into the ground along with it. At this time, the duckbill valve 120 connected to the bottom of the grouting pipe 110 ensures a seal at the bottom of the grouting pipe 110. When it is necessary to extract the Larssen sheet pile body 100, the grouting pipe is slowly... While slowly pulling the Larssen sheet pile body 100 and grouting pipe 110 upwards, the grouting device injects grout through the grouting pipe 110 into the gap that flows down after the Larssen sheet pile body 100 is pulled out. At this time, the grout opens the duckbill valve 120 due to high pressure and enters the gap that flows down after the Larssen sheet pile body 100 is pulled out, filling the voids left during pile extraction, eliminating negative pressure, and compacting the disturbed loose soil, thereby reducing soil deformation and minimizing the impact on surrounding pipelines and road structures.
[0033] The Larssen sheet pile body 100 has two fixed steel plates 140 welded to its outer wall at intervals. The grouting pipe 110 is welded to these two fixed steel plates 140. The larger fixed steel plates 140 allow for secure connection between the grouting pipe 110 and the Larssen sheet pile body 100, increasing the welding area and improving connection stability. Each fixed steel plate 140 is connected to a clamp 130 for securing the grouting pipe 110, further ensuring a stable connection between the grouting pipe 110 and the outer wall of the Larssen sheet pile body 100. The bottom of the grouting pipe 110 is connected to two opposing valve protection steel plates 150 located on either side of the duckbill valve 120. These plates protect the duckbill valve 120, preventing it from being affected by ground soil pressure when the grouting pipe 110 is driven into the ground along with the Larssen sheet pile body 100.
[0034] In other alternative embodiments, the number of grouting pipes 110 connected to the outer wall of the Larssen sheet pile body 100 may be two or more.
[0035] In other alternative embodiments, the number of fixing steel plates 140 connecting the Larssen sheet pile body 100 and the grouting pipe 110 may be one, three or more.
[0036] In other alternative embodiments, the number of valve protection steel plates 150 connected to the bottom of the grouting pipe 110 may be one, three or more.
[0037] Example 2
[0038] like Figure 3 As shown, this application embodiment provides a Larssen sheet pile with synchronous grouting during pile extraction. Its structure is roughly the same as that of the Larssen sheet pile body 100 provided in Embodiment 1. The difference is that in this embodiment, it also includes two reinforcing rods 160. The two ends of each reinforcing rod 160 are respectively connected to two protective valve steel plates 150. The outer wall of the Larssen sheet pile body 100 is provided with side protrusions 170 arranged at intervals and extending along the height direction. The bottom corner of the Larssen sheet pile body 100 protrudes to form a bottom corner protrusion 180.
[0039] The Larssen sheet pile with synchronous grouting during pile extraction provided in this application embodiment has two reinforcing rods 160 connected to two protective valve steel plates 150 at both ends. The two protective valve steel plates 150 can be stably connected to the reinforcing rods 160 and the grouting pipe 110 to form a whole, which effectively improves the structural strength of the two protective valve steel plates 150 to protect the duckbill valve 120.
[0040] The outer wall of the Larssen sheet pile body 100 is provided with spaced-apart side protrusions 170 extending along the height direction. When the Larssen sheet pile body 100 is pulled out, the side protrusions 170 can be used to form a grouting groove in the soil, ensuring that even if the soil partially collapses due to the pull-out of the Larssen sheet pile body 100, the grout injected by the grouting pipe 110 can still fully fill the voids inside the soil through the grouting groove. At the bottom corner of the Larssen sheet pile body 100, a bottom corner protrusion 180 is formed. When the Larssen sheet pile body 100 is pulled out, the bottom corner protrusion 180 can be used to support the weak part of the soil at the turning point, ensuring that the grout injected by the grouting pipe 110 has sufficient time to fill the voids, and preventing the soil from collapsing too quickly after the Larssen sheet pile body 100 is pulled out, which would affect the grout filling of the voids.
[0041] In other alternative embodiments, the number of reinforcing rods 160 and side protrusions 170 may be one, two, three or more.
[0042] Example 3
[0043] like Figure 4 As shown, this application embodiment provides a Larssen sheet pile with simultaneous grouting during pile extraction. Its structure is roughly the same as that of the Larssen sheet pile body 100 provided in Embodiment 1. The difference is that in this embodiment, a retaining plate 190 is provided at the bottom of the grouting pipe 110, and a retaining rod 200 is hinged to the top of the retaining plate 190. The top of the retaining rod 200 extends to the top of the grouting pipe 110. A fixing seat 210 is provided at the top of the grouting pipe 110. A fixing hole 220 for inserting the retaining rod 200 is opened at the bottom of the fixing seat 210. The fixing hole 220 penetrates the side wall of the fixing seat 210 to form an opening 230.
[0044] Before the Larssen sheet piles for simultaneous grouting during pile extraction provided in this embodiment are driven into the ground, the operator can place the retaining plate 190 into the bottom of the grouting pipe 110, and rotate the top of the retaining rod 200, which is hinged to the top of the retaining plate 190, through the opening 230 into the fixing hole 220 to press against the fixing seat 210. This uses the fixing seat 210 to press against the retaining rod 200, thus lowering the retaining plate 190 and fixing it inside the grouting pipe 110, preventing the grouting pipe 110 from being pulled along with the Larssen sheet pile. When the pile body 100 is driven into the ground, the duckbill valve 120 fails, causing soil to enter the grouting pipe 110 and affecting grouting. After the grouting pipe 110 is driven into the ground along with the Larssen sheet pile body 100, the top of the retaining rod 200 is rotated through the opening 230 to disengage from the fixing hole 220 and separate from the fixing seat 210. Then the retaining rod 200 and the retaining plate 190 can be removed and the grouting pipe 110 can be used for grouting when the Larssen sheet pile body 100 is pulled out.
[0045] This application also provides a sheet pile support structure, which includes a plurality of Larssen sheet piles that are connected in sequence and grouted synchronously during pile extraction.
[0046] The embodiments described above are some, but not all, of the embodiments of this application. The detailed description of the embodiments of this application is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
Claims
1. A Larsen steel sheet pile for simultaneous grouting during pile extraction, comprising a Larsen steel sheet pile body, characterized in that, The Larson steel sheet pile body is further connected with at least one clamping hoop for fixing the grouting pipe.
2. The Larsen steel sheet pile of claim 1, wherein, The Larson steel sheet pile body is further connected with at least one clamping hoop for fixing the grouting pipe.
3. The Larsen steel sheet pile of claim 2, wherein, The Larson steel sheet pile body is further connected with at least one clamping hoop for fixing the grouting pipe.
4. The Larsen steel sheet pile of claim 1, wherein, The Larson steel sheet pile body is further connected with at least one clamping hoop for fixing the grouting pipe.
5. The Larsen steel sheet pile of claim 1, wherein, The outer wall of the Larson steel sheet pile body is provided with a plurality of side protrusions extending in the height direction.
6. The Larsen steel sheet pile of claim 1, wherein, The bottom corner of the Larson steel sheet pile body is protruded to form a bottom corner protrusion.
7. The Larsen steel sheet pile of claim 1, wherein, The inner bottom of the grouting pipe is provided with a soil retaining plate, the top of the soil retaining plate is hingedly connected with a soil retaining rod extending to the top of the grouting pipe, the top of the grouting pipe is provided with a fixing seat, the bottom of the fixing seat is provided with a fixing hole for inserting the soil retaining rod, and the fixing hole penetrates the side wall of the fixing seat to form an opening.
8. A steel sheet pile support structure characterized by, The Larson steel sheet pile body is further connected with at least one clamping hoop for fixing the grouting pipe.